题目内容
求未知数
126÷x=42
19×6-2x=28.
126÷x=42
19×6-2x=28.
126÷x=42
126×
×x=42x
42x=126
x=3;
②19×6-2x=28
114-2x+2x=28+2x
2x+28-28=114-28
2x=92
2x÷2=92÷2
x=46.
126×
| 1 |
| x |
42x=126
x=3;
②19×6-2x=28
114-2x+2x=28+2x
2x+28-28=114-28
2x=92
2x÷2=92÷2
x=46.
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